shutdown (freeCodeCamp#24654)

* shutdown

added an explanation for the shutdown command

* corrected file folder and filename

guide/english/bash/bash-shutdown/index.md

@@ -0,0 +1,21 @@
+---
+title: Bash shutdown
+---
+
+Bash Command: shutdown
+
+`shutdown` - typing the shutdown command will schedule your system to be shutdown at a given point in time.
+
+Options:
+
++m  , will specify the minutes until shutdown.
+
+-h  , will specify the hours until shutdown.
+
+-r  , will trigger a restart of the system after shutting it down.
+
+message , will display a message of your chosing prior to shutting it down.
+
+Syntax:
+
+shutdown -h +m message